/*
 * Copyright (C) 2011 by Fabien Barbero
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.flickr.desktop.core.login;

import com.flickr.api.FlickrServiceException;
import com.flickr.api.auth.AuthenticationService;
import com.flickr.api.auth.Caller;
import com.flickr.desktop.core.config.FlickrConfiguration;
import com.flickr.desktop.core.events.UserLoggedEvent;
import com.flickr.desktop.gui.commands.ShowLoginCommand;
import com.google.inject.Inject;
import java.awt.Desktop;
import java.io.File;
import java.io.IOException;
import java.net.URI;
import org.codeartisans.java.sos.messagebus.MessageBus;

/**
 *
 * @author Fabien Barbero
 */
public class LoginServiceImpl implements LoginService {

    private final AuthenticationService authService;
    private final FlickrConfiguration config;
    private final MessageBus msgBus;

    @Inject
    public LoginServiceImpl(AuthenticationService authService, FlickrConfiguration config, MessageBus msgBus) {
        this.authService = authService;
        this.config = config;
        this.msgBus = msgBus;
    }

    @Override
    public void authenticateUser() throws BrowserNotFoundException, AuthenticationException {
        try {
            URI uri = authService.getAuthPage();

            File browserFile = config.getExternalBrowserExecutable();
            if (browserFile != null) {
                if (!browserFile.exists()) {
                    throw new BrowserNotFoundException("Browser executable doesn't exists " + browserFile);
                }
                msgBus.publish(new ShowLoginCommand());
                ProcessBuilder procBuilder = new ProcessBuilder(browserFile.getPath(), uri.toASCIIString());
                procBuilder.directory(browserFile.getParentFile());
                procBuilder.start();

            } else if (Desktop.isDesktopSupported()) {
                msgBus.publish(new ShowLoginCommand());
                Desktop.getDesktop().browse(uri);

            } else {
                throw new BrowserNotFoundException("No default browser found");
            }
            Caller caller = authService.authenticate();
            msgBus.publish(new UserLoggedEvent(caller));

        } catch (FlickrServiceException ex) {
            throw new AuthenticationException("Error authenticating user", ex);
        } catch (IOException ex) {
            throw new AuthenticationException("Error authenticating user", ex);
        }
    }
}
